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Keystone Butterfly Valve, Series GRF

Series GRF Butterfly Valve

Brand: Keystone
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A heavy duty double flanged concentric design resilient seated butterfly valve.
Features
  • Double flanged body design with face-to-face dimensions, according to EN 558 Series 20, API 609 and AWWA C504 short.

  • Designed according to EN 593 and API 609.

  • The seat is field replaceable and fully isolates the body and shaft from the flow.

  • Primary shaft sealing exceeds the pressure rating of the valve and prevents leakage through shaft area to atmosphere.

  • A secondary shaft sealing provides back-up safety.

  • A molded-in O-ring in the seat for flange sealing eliminates the need for gaskets.

  • Shaft seals prevent moisture penetrating into the shaft area.

  • Rounded polished disc edge gives full concentric sealing, lower torques, longer seat life and drop-tight shut-off.

  • Extended body neck allows for pipe insulation.

  • Top and bottom shaft bearings for optimized support and minimum friction and decreased torque.

  • Top bushing absorbs actuator side thrust loads.

  • All valves comply to Pressure Equipment Directive (97/23/EU) Module B1 + D, CE Marking.

    • Specifications

    Brand

    Approvals & Certifications

    • ABS, American Bureau of Shipping Shipboard, PED

    Body Design

    • Short Pattern

    Material

    • Ductile Iron, EPDM Rubber, Carbon Steel, Buna-N, 316 Stainless Steel

    Media

    • Air, Inert Gas, Air, Hot Water, Liquid, Water, Liquids

    Operating Temperature

    • Up to 250° F (120° C)

    Pressure Class

    • PN, ASME

    Process Connection Type

    • Class 150 RF, 150 FF, 125 FF

    Seat / Seal Type

    • Resilient

    Shutoff Class

    • Zero Leakage

    Standards

    • API 609, ASME B16.34

    Valve Size

    • NPS 60, NPS 56, NPS 48, NPS 44, NPS 42, NPS 40, NPS 36, NPS 30, NPS 24 / DN 600

    Valve Size Standard

    • NPS, DN

    Valve Type

    • Butterfly

    Documentation

    Data Sheets

    Product Manuals

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